--- /dev/null
+/*
+ * ============LICENSE_START=======================================================
+ * org.onap.dcae
+ * ================================================================================
+ * Copyright (c) 2020 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.dcaegen2.platform.mod.web.service.basemicroservice;
+
+import org.onap.dcaegen2.platform.mod.model.basemicroservice.BaseMicroservice;
+import org.onap.dcaegen2.platform.mod.model.microserviceinstance.MsInstance;
+import org.onap.dcaegen2.platform.mod.model.restapi.MicroserviceCreateRequest;
+import org.onap.dcaegen2.platform.mod.model.restapi.MicroserviceUpdateRequest;
+
+import java.util.List;
+
+/**
+ * An interface to access Ms Services
+ */
+public interface MsService {
+ BaseMicroservice createMicroservice(MicroserviceCreateRequest microserviceRequest);
+
+ List<BaseMicroservice> getAllMicroservices();
+
+ BaseMicroservice getMicroserviceById(String baseMsId);
+
+ BaseMicroservice getMicroserviceByName(String msName);
+
+ void updateMicroservice(String requestedMsId, MicroserviceUpdateRequest updateRequest);
+
+ void saveMsInstanceReferenceToMs(BaseMicroservice microservice, MsInstance msInstance);
+
+ void updateMsInstanceRef(MsInstance msInstance);
+}